I've eaten at other OPHs, and it is a very good chain, I will definitely admit that (I love the Swedish pancakes). But since when did having HUGE food become the most desireable thing, more than good service and atmosphere? There enough fat Americans without getting excited about a place that insults you and makes you wait forever, just because you can get a huge serving of super-processed carbohydrates and fake maple syrup (yes, it's fake--maybe a touch of real stuff thrown in, but no way is this all real). Who really needs an omlet this big?? (A family of 4?) The terrible service far out-weighs the good here (even if you simply total up the weight of your meal), and i just can't recommend it. Try OPH someplace else, it's definitely worth it, but just NOT in Las Vegas.
Pros: Delicious pancakes, esp Swedish & Apple
Cons: Terrible service and super deathly high-fat menu. No kids--wait is too long.